1020031311 has 8 divisors (see below), whose sum is σ = 1464660400. Its totient is φ = 627711552.

The previous prime is 1020031303. The next prime is 1020031357. The reversal of 1020031311 is 1131300201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020031311 - 2³ = 1020031303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020031391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13077286 + ... + 13077363.

It is an arithmetic number, because the mean of its divisors is an integer number (183082550).

Almost surely, 2^1020031311 is an apocalyptic number.

1020031311 is a deficient number, since it is larger than the sum of its proper divisors (444629089).

1020031311 is a wasteful number, since it uses less digits than its factorization.

1020031311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26154665.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1020031311 is about 31937.9290343003. The cubic root of 1020031311 is about 1006.6330095736.

Adding to 1020031311 its reverse (1131300201), we get a palindrome (2151331512).

The spelling of 1020031311 in words is "one billion, twenty million, thirty-one thousand, three hundred eleven".